Organizations are increasingly turning to an internal, or private, cloud to run their data center operations, while de-emphasizing their use of public clouds, according to a recent survey from the Open Data Center Alliance (ODCA). The accompanying "Cloud Adoption Survey" report reveals that while reservations about cloud deployment are generally declining, concerns about security and vendor lock-in still present the greatest barriers to adoption. At the same time, there has been a dramatic increase in the number of companies seeking to use software-defined networking models to direct purchasing decisions. Organizations "are focused primarily on internal cloud solutions," according to the report. "Among members, most have implemented or are soon implementing all of the core features of a cloud deployment. Perhaps most notable is the evidence that members are increasingly interested in … software-defined networking and hybrid cloud solutions." The ODCA is an independent IT consortium of global IT leaders that works to provide a unified customer vision for long-term data center requirements. More than 100 ODCA members took part in the research.